CN1160134A

CN1160134A - Pipe joint

Info

Publication number: CN1160134A
Application number: CN 97102847
Authority: CN
Inventors: H·阿勒克
Original assignee: Robert Bosch GmbH
Current assignee: Robert Bosch GmbH
Priority date: 1996-03-01
Filing date: 1997-02-28
Publication date: 1997-09-24
Also published as: DE19607986A1; IT1290292B1; ITMI970268A1

Abstract

The invention relates to a pipe fitting which can be arranged fixedly in axial direction detachably, in particular to a pipe joint of pipe fitting for circulating liquid, the invention is provided with at least a crescent-shaped guide device with lock slots, the pipe fitting can be inserted into the pip joint axially and can be buckled tightly with the pipe joint elastically relative to the rotation of the pipe joint, wherein the pipe fitting is provided with at least a radial protrusion that is jointed with the pipe joint and arranged fixedly in at least one lock slot, therefore at least a spring is supported by the crescent-shaped guide device so as to realize simple manufacture and reduce total amount, the spring is used as the guide part from the protrusion to the lock slot so that the pipe fitting and the pipe joint are locked connectively in sealed means.

Description

Pipe joint

The present invention relates to a kind of pipe joint.

Known various pipe joint all has plug assembly, and promptly this pipe joint can be by inserting a pipe that will connect, and realize locking by rotation after insertion.

The known pipe joint structure of this class is complicated and be made up of considerable part.So this class pipe joint is quite heavy and expensive.A kind of known pipe joint has a kind of plug assembly, and this device can insert and rotate on the link position of connected piece, and there is the telescopic spring mechanism of a complexity the inside and connected piece can be locked on the final position by spring prestressing force.

This pipe joint makes the spray gun inconvenience of hand-operated tools such as high-pressure cleaner use especially owing to heaviness.

In contrast, the simple in structure and retaining spring of having packed into has only quite light weight to pipe joint of the present invention because of it, and available plastic injection-moulded one-tenth has sizable tolerance, thereby obviously reduces manufacture cost.

Embodiment below in conjunction with accompanying drawing describes the present invention in detail.

Fig. 1 represents a high-pressure cleaner with pipe joint of the present invention;

The pipe joint of Fig. 2 presentation graphs 1 with enlarged view before jet pipe is connected;

Fig. 3 presentation graphs 2 pipe joints just are connected with jet pipe;

Fig. 4 presentation graphs 2 pipe joints are connected with jet pipe;

That Fig. 5 represents is consistent with Fig. 2 pipe joint basically, have a backstop is used for avoiding too another embodiment of the pipe joint of big spring stroke;

The end face of Fig. 6 presentation graphs 5 pipe joints.

High-pressure cleaner 10 with a press water outlet 11 shown in Figure 1 can be connected with the connection-peg 14 of one section high pressure hose 12 on the water outlet 11, on its end corresponding, have a spray gun 16 with connection-peg 14, but suit one elongated segment pipe 18 on the interface of spray gun 16, insertion tube joint 20 on the joint that prolongs pipe.Pipe joint 20 is connected with jet pipe 22, and wherein the overlap joint section 19 of pipe joint 20 can overlap the abutting end of jet pipe 22.

Fig. 2 presentation graphs 1 pipe joint 20 with enlarged view before jet pipe 22 is connected, can know the projection 24,25 of the diametrically contraposition of finding out jet pipe among the figure.Can see the inner cylinder 26 that has two opposed axial grooves 28,29 on pipe joint 20, this axial groove is used for embedding projection 24,25 and carries out the transition to tubular overlap joint pipe 21 band draw-in grooves 33, the swing link guiding device 31 of (34), (32).Here can only see a side of pipe joint 20.So the reference number of the side that can't see is drawn together with bracket.

The profile of swing link guiding device 31, (32) constitutes at the edge of window formula opening on the wall that passes through overlap joint pipe 21 on the respective side by a tongue 35, (36) respectively at axial end face.In addition, can find out that also tongue 35, (36) have guiding surface 37, (38), when rotable nozzle 22, these two guiding surface guiding radial protrusions 24,25 enter the stop position of draw-in groove 33, (34) by inclined-plane 43, location, (44).Secondly, spring 35, (36) are bearing on the adjacent supporting surface 39,40 of guiding surface 37, (38), and this supporting surface is fixed on projection 24,25 on the stop position of draw-in groove 33, (34).

In addition, can know and find out that spring 35, (36) become the profile of ligule with the materials processing of pipe joint 20 or overlap joint pipe 21, but also can find out 45, the 46 and circular grooves 47 that are used for embedding O RunddichtringO 49 of radial protrusion on the rear end 41 of pipe joint 20.Like this, pipe joint that another does not illustrate in the drawings, that size cooperates with rear end 41 can be inserted in the rear end 41 of pipe joint.

Pipe joint 20 shown in Figure 3 just will be connected with the jet pipe 22 of Fig. 2, and its protrusions 24,25 axially enters in the axial groove 28,29, but does not enter swing link guiding device 31, (32) as yet.

Fig. 4 represents that pipe joint 20 is connected with jet pipe 22, and projection 24,25 has been passed through swing link guiding device 31,32, and is fixed in the draw-in groove 33,34 by prestressing force by means of the supporting surface 39,40 of spring 35,36.

Fig. 5 represents to have another embodiment who overlaps the pipe joint 60 of pipeline section 61.This example only is with Fig. 2 embodiment's difference, in the profile at the edge of the swing link guiding device 71 adjacent, constitute the backstop 81 of a stepped shape with spring 75, like this, for example when the pipe fitting that interconnects produces axial mechanical stress, can avoid the too big spring travel of spring 75.

The radial protrusion 84 of jet pipe 62 is pressed in the draw-in groove 73 by spring 75 and is maintained fixed.The overlap joint pipeline section 61 of pipe joint 60 has parallel

radial groove

81,82, and they are spaced from each other by the connection strap 84 that rib constitutes.Thereby alleviate the weight of pipe joint 60, be convenient to again grasp simultaneously.For weight reduction, the end face 85 of overlap joint pipeline section 61 has groove 87 (Fig. 6).

The end view drawing of pipe joint 60 shown in Figure 6 is represented the

axial groove

68,69 in the inner cylindrical tube 66, and the distance that interior pipe 86 passes through to outer tube 88 constitutes axial groove 87.Being provided with

cross rib

89,90,91,92,93,94 between interior pipe 86 and outer tube 88 is supporting.

Pipe end 63 usefulness projection 64 pushes in the pipe joint 60 till shifting axial stop dog position onto.Then jet pipe 62 is rotated with respect to pipe joint 60, projection 64 fastens till a very little axial displacement enters draw-in groove 73 stop positions along

edge

70,72 slips of swing link guiding device 71 and spring 75 outstanding in the rotary course simultaneously.Like this, jet pipe 62 has just reached axial locking and rotational lock position, and only just detachable when overcoming the elastic force of spring 75 by connected piece opposite spin and minimum power of needs.

Claims

1. be used for removably pipe fitting of axial restraint, particularly there is the pipe joint (20) of the pipe fitting (22) of circulating liquid to have at least one and has draw-in groove (33,34) swing link guiding device (31,32), pipe fitting (22) is axially in the insertion tube joint (20), and by with respect to pipe joint (20) rotation and with this pipe joint elasticity fastening, wherein, at least one radial protrusion (24 of pipe fitting (22), 25) with pipe joint (20) overlap joint, and be fixed at least one draw-in groove (33,34) in, it is characterized in that, swing link guiding device (31,32) have a spring (35) at least, this spring is as projection (24,25) arrive draw-in groove (33,34) guiding element and conduct projection (24,25) at draw-in groove (33,34) locking element in and pipe fitting (22) and pipe joint (20) are tightly connected.

2. by the pipe joint of claim 1, it is characterized in that at least one spring (35) integral body is packed in the pipe joint (20).

3. by the pipe joint of claim 2, it is characterized in that this pipe joint has second spring (36) with first spring (35) diametrically contraposition.

4. by the pipe joint of claim 3, it is characterized in that spring (35,36) is preferably in circumferencial direction and makes ligule with pipe joint (20).

5. by the pipe joint of claim 4, it is characterized in that spring (35,36) is common to be passed through injection molded on the wall of pipe joint (20) with swing link guiding device (31,32) and draw-in groove (33,34).

6. by each pipe joint of aforementioned claim, it is characterized in that, spring (35,36) supports the inclined-plane (37,38) of a guide hump (24,25) respectively, and the internal diameter on these inclined-planes extends in parallel with the chucking inclined-plane (43,44) of guiding draw-in groove (33,34).

7. by each pipe joint of aforementioned claim, it is characterized in that, between the parallel elongated slot (82,83) on pipe joint (60) overlap joint pipeline section (61) excircle, constitute some ribs (84).

8. by each pipe joint of aforementioned claim, it is characterized in that the end-face wall of the overlap joint pipeline section (61) of pipe joint (60) is provided with axial deep trouth (87).

9. by each pipe joint of aforementioned claim, it is characterized in that, have radial protrusion (45,46) on the rear end of this pipe joint and be used for being connected with reverse link.

10. by each pipe joint of aforementioned claim, it is characterized in that, the plastics manufacturing of this pipe joint, and use as the parts of high-pressure cleaner.